131 tone equal temperament

131-EDO, or 131-tET, divides the octave into 131 equal steps of approx. 9.1603 Cents, each one. 131edo is the next EDO, after 81edo, on the "Golden Tone System" (Das Goldene Tonsystem) of Thorvald Kornerup, using the 131b val. The patent val has a fifth sharp by 3.389 cents rather than flat like the meantone fifth; rather than tempering out 81/80 it tempers out the immunity comma, 1638400/1594323. In the 7-limit it tempers out 3125/3087 and 245/243, so that it supports bophier temperament.

131edo is the 32nd prime EDO.

Some MOS Scales in 131-EDO:

33 16 33 33 16	Pentatonic (comparable with 8edo and 99edo)
23 23 8 23 23 23 8	Pytagorean tuning (comparable with 17edo)
21 21 13 21 21 21 13	Meantone tuning (comparable with 50edo)
19 12 19 19 12 19 19 12	Father Tuning (comparable with 55edo)
18 18 18 18 18 18 18 5	Porcupine Tuning (comparable with 29edo and 80edo)
17 17 17 6 17 17 17 17 6	Superdiatonic tuning (comparable with 23edo)
13 13 9 13 13 13 9 13 13 13 9	Improper Sensi-11 Tuning
11 11 11 11 11 5 11 11 11 11 11 11 5	De Vries 13-tone Tuning
10 10 10 7 10 10 10 10 7 10 10 10 10 7	Ketradektriatoh Tuning
21 17 21 17 17 21 17	mohaha7
4 17 17 17 4 17 17 4 17 17	mohaha10